#403FA4#403FA4

#403FA4 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.1% C 0.158 H 277.9°. Best body text is #FFFFFF at 8.52:1 contrast (WCAG AA passes).

Color values

HEX	#403FA4
RGB	rgb(64, 63, 164)
HSL	hsl(241, 44%, 45%)
HSV	hsv(241, 62%, 64%)
CMYK	cmyk(61%, 61.6%, 0%, 35.7%)
CIE-LAB	lab(32.53, 31.40, -54.58)
CIE-LCH	lch(32.53, 62.97, 299.91°)
OKLab	oklab(43.12% 0.0217 -0.157)
OKLCH	oklch(43.12% 0.158 277.9)
XYZ	xyz(10.5905, 7.3245, 35.9705)
Luminance	0.0732 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.88

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403FA4 #A3A43F

analogous

#3F71A4 #403FA4 #733FA4

triadic

#403FA4 #A4403F #3FA440

tetradic

#403FA4 #A43F71 #A3A43F #3FA473

square

#403FA4 #A43F71 #A3A43F #3FA473

split-complementary

#403FA4 #A4733F #71A43F

monochromatic

#1D1D4C #2F2E78 #403FA4 #605FC1 #8C8BD2

Accessibility & contrast

On white

8.52

#403FA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#403FA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403FA4

8.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403FA4	#FFFFFF	#000000	##FFFFFF
##403FA4	1.00	8.52	2.47	8.52
#FFFFFF	8.52	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A7

Deuteranopia (green-blind)

#0048A2

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #403fa4;
/* rgb */ color: rgb(64, 63, 164);
/* oklch */ color: oklch(43.1% 0.158 277.9);

Tailwind

colors: {
  custom: {
    50: '#7f74c0',
    500: '#403fa4',
    950: '#000000',
  },
}

SCSS

$custom: #403fa4;
$custom-light: #7f74c0;
$custom-dark: #000000;

JSON

{
  "hex": "#403fa4",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 164
  },
  "hsl": {
    "h": 240.594,
    "s": 44.493,
    "l": 44.51
  },
  "oklch": {
    "l": 0.43121,
    "c": 0.15845,
    "h": 277.9
  },
  "luminance": 0.07325
}

Semantic roles & 50–950 ramp

primary

#403FA4

secondary

#BDBD82

accent

#D454D3

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #403FA4

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →